Safety device for burners



Jan. 6, 1931. J. w. MOOMAU SAFETY DEVICE FOR BURNERS Filed vJuly 3-, 1929 l provision of a device of the above character Patented Jan. 6, 1931,

JOHN w. Moot/Inn; orwns'r nnnispwisconsiii;AssIGnoR 'orionn-neitrflro GE RGE? I w. scmuss, or M;LwAuKE wrscoNsm' 1 .SArjE T'Y'EDEvIo ron nunnnnsj application man y}, 1929; Serial m st/5,773. j

This invention" relates to improvements in One of the objects of my invention is the provision of a safety-device designed to pre- 5 vent accidental manipulation of the gascon-"j trol' valve and also toautomatically close the valve in the eventjtha'ttheflame of the" burner should be accidentally extinguished; Another object of my invention is the wherein the operating mechanismis con trolled by a thermostatic m'emberflactuated' by the heat from the'bu'rner and includes locking means which is'a'ctu'ated bythe valve for positioning the locking means in oper ative position, but provides for manipulation of the valve handle of the locking mech- A'further object-of the invention is the provision" of a safety device of" the above character wherein, when the burner is lighted, the thermostatic member will "actuate a locking element for retaining the controlling rod in operative position and the v'alveis connected to the controlling rod in such manner as to permit movement of the valve handle of the controlling rod and whereby the locking mechanism is automatically disengaged should the flame of the burner be =accidentally extinguished'so that the control ling rod willbereturne'd to its inoperative position and close the valvegthrough operative connection thereto. r With the above'and" other obj ects'in jview, the invention 1 consists in the novel; features of construction, the combination and 1 arrangements of parts hereinafter "more fully set forth, pointed outjin' the claims' and'shown in the accompanying drawings whereini Figure 1 is a bottom plan viewof aburner, illustrating the application of my'inip'roved safety device; Figure 2 is a side Figure 3 line 3+3 of Figure'2 with parts omittedl Referring more particularly 'to the draw ings, a burner 1 of any general type having a tubularfuel conduit 2 leading therefrom to elevation 59 a' mixing tube3 with afffuelinlet' nipple 4c end. of which engages is, a transverse" section on the retain "the pin 19 =in"various"adjusted posid r s V I it will be noted thatI have illustrated I connected 'tothemixing tube. The fuel let nipplefcarriesa valve having a handle 6 whereby the fuel to the burner can be readily controlled. I v

i lvlountedupon the conduit2 is a tubular supporting element 7 formed with transverse recessesin one end for' receiving the contour'of -the conduit2 whereby. the "member 7 can be easily seated upon said conduit; "Arranged at one side of the burner is a supporting plate '8 havingalateral extension 9 which 'extends'over one end of the member 7 and'the outer endof the extension 9' is founded SQ a to conform, to the tu r shape offinember' 'i. The lateral extension 9 is secured to thetubular member 7 through the "medium offbolts 10 which extend down through the fextension 9 and thr'o'u'gh' a fasherplate '11, nuts 12 being threadedonto the bolts against the outerf'ace of washer plate 11" for retaining tubular member? and plate 8 against movement. g T g The plate 8 has at its end opposite the lat eral extension '10,- an arcuate arm 13 which ex tends a'roundrthe burner 1 preferably at the outside thereof whereby thearm 13, plate 8 and extension-f9 provide a substantially arcf uate shaped' portion extending around the greater portion of the burner. Extending across theburner above the same is a ther mostatic member-'14, one end of which issecured-to an'.adjustable plate 15' at the outer end of arm "13, while" the; other end of the thermostatic-'memberl l is connected, to a movable arm 16 carried by the main body portion of the plate 8; z i I The plate 151'is pivotally connected to the extremityof arm 13, as shown at 17, and the "inner end of the plate is formed'with alateral fl ange 18 carrying a se screw 19, the inner the outer contourof arm 13'. Mounted upon the set screw-19" and I disposed between the flange 18 and the finger 'piece"20fis;a;coil spring 21 which serves to themovementof'the thermostatic member 14: is controlled whereby the amount of movement-tothe arm 16 isvaried; It will also be notedthat in a great many instances, the thermostatic members 14 will expand and contract in a greateror less degree and it is therefore necessary to provide some means for adjusting the thermostatic member in accordanee-With itsarea. of expansion and cone traction...

The movable arm 16 is pivotally mounted I on pin 22 carried by plate 8 and arranged adj aeeiit to pi ir 22 is -a pi ir 23 to which: the

inner end of the thermostatiomeinber-14ers connected. This pin 23 extends,..thiiou.gh. a1 slot 24 in plate 8, said slot being formed to accommodate the movement of th-epimdure ing the expansion and contraction of'member 1.4;. Slidabl'y mounted uponthe: undersideof.

plate 8; adjacent. the outer; edge thereof; is a control-rod25;.said rod being slidably-mount ed within suitable bearings neath; the plate 8, and. mounted on I the rod is i coil spring; 27 disposed bet-ween bearing-26 anda cross: pin 28carriedibythe rod whereby to'normall y position the rod infan] inoperative: position-,9 as shown at Figure, 1.. V

The movable-arm l6 hassecuredtoits outer end. anangnlar locking. member 29, thelat era-lportionof, whiohprojects from arm. 16. and; is, adaptedtoengagea notch 30? formed in: rofd: ewhen; themed is. projected. to. an operative position, a spring 31 engagingthe lateralportion; oi member 29- carried 'byarm 16. for urgingathislocking member 1 towardthe; notch; when the: memben' 14 expands bylthe; flame from the: burner 1, so that? the lateral; extension of the...locki-ng,member. will positivelygengage the notch; and retain rod. 25. in an operative position. I

R d325- isrp-rovided, at its-\outer-end with a lateralextension 32. and. connected toathe end armlti-zsoas. to move-thei'locking member 29 into position for engaginggnotch' 30,}whereby rod '25 will. be..maint.amed,xin an expanded maygbereadily manipulated: forlcontrolling b or. operative. position. 7 In 7 view ofivthe fact that the rod! 3g3isconnectedto the extension 32in such manner asto permit slidmgmovement of, themed in one direetion, the' valve. 5

the-flame opt-the burner. when the rod. 25-is in ail-"expanded position;v If, however,;;the flame of .therburnerwis. extinguished in anac.- cidental manner, the thermostatic member 14: will. contract-,; operating arm 16 and ,disengagingethe locking-member- 29-from-notch 30 whereby thetension of; spring; 27, will} actu- .ate.= mdJZa-to .returathesame topitsinnermost position, and due to the connection between i the tension of spring 2'( as the locking means i-sk only operated through the actuation of thermostatic memberl4'. Attention is also directedtotheiact that the amount of movementof member 14 when expanded or contreated,v can be readily controlled by set screwl f" It. will appaltentf from: the foregoing that I have providedla simple and inexpensivesatety devica'w-hich. can 'beattached; to

various typesof burners; and. will positively assure; the. closing of; the; controlling valve when theburner'is. not in use. and-will; prevent accidental opening; of the valve, and at the, same time is soconstructed that it can' be quickly and;readilyinstalled- V 1 r WhileyI have shown a-nd described the preferred. embodiment vof. my invention, it'

will. be apparent that slight. changes may be made: in the=construction when putting the invention into practice Without departing from the spiritof the, same or the scope of theappendedgclaims V.

. Lc-laimr: I J a 1. A. device of the class described including a. burner, a. valve for controlling fuel to the bur-meme a thermostatic member. acted upon by the flame from. the-burner, actuated,- roel; slidably mounted adjacent the burner" and having anotchtherein, a conmeeting; rod operatively connected to. the valve and slidablyconneotecl to the spring actuated-mod; meanscontrolled by the thermostatiemember for retaining. the spring actuated rodin; a. position, inwhich the valve is; opened whengthe burner is lighted in clnd-ingan arm connected to. the thermostatic member, aloeking member integral with and movablewith the arm; and adapted toengage the notch .to retain. said rod against movementy said -=lockin-g;member being released from the-springactuated rod through action; of thethermostatic: member when the flame. is extinguishedwhereby the tension of thespring; willobe aetu-ated'toclose said valve. H

2. In combinatiomasto-ve burner having a. supply pipe extending therefrom, and a urner valve in said pipe provided with a handle, a substantially L-shapedplate, means to. secure one arm of; theplate to-theburner supply-pipe with the other arm of the-plate located adjacent theburner, a rod 'slidingly supported thee-112L813 .mentioned' arm, a spring to yieldingly resist; movement. of the redone-direction, a wire connecting the alyezhandlefwiththe outer endiof the rod to a. spring LOG tension the spring when the valve is in open position, a trigger slidable'transversely of the plate, means providing a detaehableengagement between the trigger and. rodtohold the latter against inward movement, and a thermostatic element located adjacent the burner to actuate the trigger and release I the rod. r Q

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wiseonsin.

1 JOHN W. 'MOOMAU. 

